Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Poplar Tree Hollow | Valley | | Scioto | 38 44 08 N | 083 12 58 W |
| Poplargrove Post Office | Post Office | 345 | Pike | 39 02 40 N | 083 18 20 W |
| Poppleman School (historical) | School | 291 | Darke | 40 20 23 N | 084 27 12 W |
| Pops Lake | Lake | 170 | Lawrence | 38 32 34 N | 082 18 13 W |
| Porath Park | Park | 196 | Lorain | 41 26 07 N | 082 08 01 W |
| Porcupine Creek | Stream | | Wyandot | 40 53 10 N | 083 13 52 W |
| Port Bucyrus-Crawford County Airport | Airport | 305 | Crawford | 40 46 53 N | 082 58 29 W |
| Port Clinton | Populated Place | 177 | Ottawa | 41 30 43 N | 082 56 16 W |
| Port Clinton City Hall | Building | 177 | Ottawa | 41 30 43 N | 082 56 17 W |
| Port Clinton East Pierhead Light | Locale | 174 | Ottawa | 41 31 08 N | 082 56 08 W |
| Port Clinton Golf Course | Locale | 176 | Ottawa | 41 30 51 N | 083 01 37 W |
| Port Clinton High School | School | 177 | Ottawa | 41 30 13 N | 082 56 16 W |
| Port Clinton Light | Locale | 174 | Ottawa | 41 31 08 N | 082 56 10 W |
| Port Clinton Plaza Shopping Center | Locale | 173 | Ottawa | 41 30 49 N | 082 55 13 W |
| Port Clinton Post Office | Post Office | 176 | Ottawa | 41 30 42 N | 082 56 32 W |
| Port Columbus International Airport | Airport | 247 | Franklin | 39 59 45 N | 082 53 17 W |
| Port Homer | Populated Place | 218 | Jefferson | 40 32 38 N | 080 38 24 W |
| Port Homer Post Office (historical) | Post Office | 215 | Jefferson | 40 32 40 N | 080 38 24 W |
| Port Jefferson | Populated Place | 296 | Shelby | 40 19 43 N | 084 05 40 W |
| Port Jefferson Post Office | Post Office | 296 | Shelby | 40 19 45 N | 084 05 40 W |
| Port Jefferson School | School | 296 | Shelby | 40 19 47 N | 084 05 36 W |
| Port Jefferson United Methodist Church | Church | 296 | Shelby | 40 19 42 N | 084 05 43 W |
| Port Kenyon Airport | Airport | 291 | Knox | 40 22 14 N | 082 23 19 W |
| Port Royal School (historical) | School | 256 | Wyandot | 40 57 27 N | 083 26 21 W |
| Port Union | Populated Place | 184 | Butler | 39 19 58 N | 084 27 48 W |
| Port Union Bible Chapel | Church | | Butler | 39 19 59 N | 084 27 49 W |
| Port Union Industrial Park | Locale | 198 | Butler | 39 19 30 N | 084 28 02 W |
| Port Union Post Office (historical) | Post Office | 185 | Butler | 39 19 58 N | 084 27 46 W |
| Port Union Post Office (historical) | Post Office | 184 | Butler | 39 20 00 N | 084 27 50 W |
| Port Washington | Populated Place | 250 | Tuscarawas | 40 19 41 N | 081 31 14 W |
| Port Washington Elementary School | School | 249 | Tuscarawas | 40 19 52 N | 081 31 09 W |
| Port William | Populated Place | 311 | Clinton | 39 33 07 N | 083 47 11 W |
| Port William United Methodist Church | Church | 314 | Clinton | 39 33 12 N | 083 47 05 W |
| Port Williams Post Office | Post Office | 311 | Clinton | 39 33 05 N | 083 47 11 W |
| Porta Coeli Cemetery | Cemetery | 201 | Lucas | 41 42 38 N | 083 42 39 W |
| Portage | Populated Place | 209 | Wood | 41 19 36 N | 083 39 03 W |
| Portage Cemetery | Cemetery | 209 | Wood | 41 19 45 N | 083 38 14 W |
| Portage Center | Populated Place | 229 | Hancock | 41 07 27 N | 083 43 38 W |
| Portage Center Post Office (historical) | Post Office | 230 | Hancock | 41 07 25 N | 083 43 40 W |
| Portage Chapel | Church | 224 | Hancock | 41 09 09 N | 083 44 45 W |
| Portage Country Club | Locale | 313 | Summit | 41 06 39 N | 081 33 07 W |
| Portage County | Civil | 315 | Portage | 41 10 00 N | 081 11 59 W |
| Portage County Airport | Airport | 366 | Portage | 41 12 36 N | 081 15 05 W |
| Portage County Courthouse | Building | 345 | Portage | 41 09 24 N | 081 14 37 W |
| Portage County Home | Building | 366 | Portage | 41 12 28 N | 081 15 35 W |
| Portage Elementary School | School | 180 | Ottawa | 41 30 28 N | 082 52 13 W |
| Portage Elementary School | School | 209 | Wood | 41 19 37 N | 083 38 52 W |
| Portage Junior High School | School | 312 | Summit | 41 01 41 N | 081 35 26 W |
| Portage Lakes | Lake | 300 | Summit | 40 59 03 N | 081 32 05 W |
| Portage Lakes | Lake | 322 | Summit | 41 00 23 N | 081 31 26 W |
| Portage Lakes | Populated Place | 321 | Summit | 41 00 26 N | 081 31 37 W |
| Portage Lakes State Park | Park | 313 | Summit | 40 58 09 N | 081 33 25 W |
| Portage Lakes Wetland State Nature Preserve | Park | 295 | Summit | 40 59 59 N | 081 32 00 W |
| Portage Park | Park | 229 | Wood | 41 10 31 N | 083 25 43 W |
| Portage Path Elementary School | School | 335 | Summit | 41 05 44 N | 081 32 41 W |
| Portage Post Office | Post Office | 209 | Wood | 41 19 35 N | 083 39 01 W |
| Portage Quarry | Mine | 204 | Wood | 41 20 09 N | 083 39 10 W |
| Portage River | Stream | | Ottawa | 41 30 59 N | 082 56 14 W |
| Portage School | School | 346 | Stark | 40 52 38 N | 081 24 15 W |
| Portage School | School | 207 | Wood | 41 17 49 N | 083 35 16 W |
| Portage Siding | Locale | 350 | Portage | 41 05 03 N | 081 23 29 W |
| Portage Square Shopping Center | Locale | 344 | Wayne | 40 49 39 N | 081 54 37 W |
| Portage Trail Park | Park | 191 | Sandusky | 41 19 17 N | 083 09 11 W |
| Portals of Glory United Baptist Church | Church | 223 | Franklin | 39 54 37 N | 082 59 29 W |
| Porter | Populated Place | 209 | Gallia | 38 55 42 N | 082 16 57 W |
| Porter Airport | Airport | 317 | Muskingum | 39 57 15 N | 082 10 60 W |
| Porter Chapel African Methodist Episcopal Church (historical) | Church | 176 | Erie | 41 26 59 N | 082 40 53 W |
| Porter Church | Church | 164 | Scioto | 38 46 05 N | 082 50 33 W |
| Porter Creek | Stream | | Cuyahoga | 41 29 26 N | 081 55 56 W |
| Porter Ditch | Canal | 271 | Seneca | 41 06 53 N | 082 58 40 W |
| Porter Hall | Building | 196 | Athens | 39 19 29 N | 082 06 14 W |
| Porter Hall | Building | 269 | Butler | 39 30 11 N | 084 44 08 W |
| Porter Hollow | Valley | | Brown | 38 43 44 N | 083 47 13 W |
| Porter Hollow | Valley | | Ross | 39 18 56 N | 083 12 27 W |
| Porter Lake | Reservoir | 298 | Muskingum | 39 57 36 N | 082 10 54 W |
| Porter Lake Dam | Dam | 298 | Muskingum | 39 57 36 N | 082 10 54 W |
| Porter Pond | Reservoir | 230 | Meigs | 38 59 12 N | 081 52 11 W |
| Porter Pond Dam | Dam | 230 | Meigs | 38 59 12 N | 081 52 11 W |
| Porter Post Office (historical) | Post Office | 210 | Gallia | 38 55 40 N | 082 16 60 W |
| Porter Ridge | Ridge | 270 | Brown | 38 44 27 N | 083 47 13 W |
| Porter Run | Stream | | Muskingum | 39 49 14 N | 082 03 58 W |
| Porter Run | Stream | | Washington | 39 25 25 N | 081 16 19 W |
| Porter School (historical) | School | 369 | Licking | 39 58 17 N | 082 19 03 W |
| Porter School (historical) | School | 270 | Muskingum | 39 50 08 N | 082 09 04 W |
| Porter Tabernacle | Church | 168 | Scioto | 38 46 18 N | 082 50 39 W |
| Porter-Hays School | School | 161 | Hamilton | 39 06 23 N | 084 31 25 W |
| Porter-Stark Cemetery | Cemetery | 320 | Delaware | 40 18 42 N | 082 50 38 W |
| Porterbrook | Populated Place | 208 | Gallia | 38 49 42 N | 082 16 60 W |
| Porterfield | Populated Place | 188 | Washington | 39 17 00 N | 081 39 20 W |
| Porterfield Run | Stream | | Belmont | 40 00 57 N | 080 54 46 W |
| Porters Corners | Populated Place | 357 | Mahoning | 40 59 16 N | 080 38 01 W |
| Porters Run | Stream | | Belmont | 39 52 11 N | 080 49 30 W |
| Portersfield Cemetery | Cemetery | 314 | Trumbull | 41 10 12 N | 080 36 28 W |
| Portersville | Populated Place | 322 | Perry | 39 40 29 N | 082 01 52 W |
| Portersville Post Office (historical) | Post Office | 319 | Perry | 39 40 30 N | 082 01 50 W |
| Portiuncula | Building | 201 | Lucas | 41 42 38 N | 083 42 30 W |
| Portiuncula Chapel | Church | 294 | Jefferson | 40 22 32 N | 080 37 12 W |
| Portland | Populated Place | 187 | Meigs | 39 00 12 N | 081 46 16 W |
| Portland Elementary School | School | 187 | Meigs | 39 00 15 N | 081 46 29 W |
| Portland Post Office | Post Office | 187 | Meigs | 39 00 10 N | 081 46 14 W |
| Portland United Methodist Church | Church | 184 | Meigs | 39 00 10 N | 081 46 07 W |
| Portland-Outhwaite Recreation Center | Park | 207 | Cuyahoga | 41 29 29 N | 081 39 19 W |
| Portman Park | Park | 238 | Licking | 39 54 31 N | 082 48 47 W |
| Portside Marketplace | Building | 181 | Lucas | 41 39 08 N | 083 31 57 W |
| Portsmouth | Populated Place | 162 | Scioto | 38 43 54 N | 082 59 52 W |
| Portsmouth Bar and Law Library | Building | 161 | Scioto | 38 44 07 N | 083 00 01 W |
| Portsmouth Church of God | Church | 162 | Scioto | 38 44 03 N | 082 58 51 W |
| Portsmouth City Hall | Building | 162 | Scioto | 38 43 53 N | 082 59 52 W |
| Portsmouth East High School | School | 166 | Scioto | 38 45 31 N | 082 53 18 W |
| Portsmouth East Middle School | School | 166 | Scioto | 38 45 31 N | 082 53 20 W |